The big gains for ag are in the biological sciences.

The most promise for science intervening to boost agriculture is going to come from the biology side of science. Engineering has had a fine day, but I think the promise of water projects and irrigation is largely delivered, with some moderate implementation left. Chemistry was a fucking disaster. The increased yields from fertilizers and pesticides were nice, but coming to depend on them is a dangerous way to live in a finite world. The pollution costs have been very high. I always hated chemistry.

I don’t especially love biology, but I think that’s the place to look for big gains in the next few decades. Using fancy-sounding biology to explain and verify agricultural craft is a good way to resurrect it. Even more than that, I am resentfully seeing the need for altered plants. There’s talk of turning annual plants into perennials and getting a crop off for multiple years. We could use plants modified to take up salts. We could use crops better able to withstand dry conditions. That may mean GMO’s, which makes me sulky and resistant. But perhaps they’re too useful a tool to refuse.

In any case, I think it is going to mean a lot of very close biological and agronomic study. How much can you deficit irrigate your crops and what happens to yields next year? What is going to happen to nitrogen uptake in a high carbon atmosphere? Why does good tilth increase water retention in soils? What plants and practices increase soil carbon sequestration? I think the biological sciences hold some answers that will give us an edge, and I’ll take every advantage we can get.

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Few more days.

Man. It’ll BE the future by the time I get this last piece up on the future of CA agriculture. But it is half-written and might get finished on my flight. Which means that it will wait for a few days until I get back to where I can post it. Mostly, I just want to say that I’m not abandoning the theme or the blog. Have a good weekend!

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More on the future of agriculture; boundaries and drivers.

Fortunately, all the problems from climate change and depletion point to similar and overlapping solutions. Unfortunately, the solutions will require radical change. It will also considerably reduce California food output, decrease meat in our diet and increase prices.

There are a few realities that I think will form the boundaries of what happens. Within those, we can make choices to direct how agriculture ends up.

First, oil is a substitute for labor. As oil becomes too expensive to be used for current mechanization, human and animal labor will fill in behind it or the enterprise will stop. Increasing energy use efficiency can give us some elasticity in substitution, but re-fitting machines also costs money

California is a great growing region, with very large areas of world class soils and a long growing season close to millions of comparatively rich eaters. Unless we get into paleodrought hydrology, we have enough water to sustain less agriculture (about 2/3rds) as well as desert-friendly cities.

Food prices will go up substantially, either because of reduced supply as land goes out of production, or oil or labor costs, or both. If meat and dairy production are forced to internalize their environmental costs, large concentrated operations will end.

The next many decades will see a constantly moving climate with increasing major perturbations. Under those conditions, rather than lock in expensive responses, the guiding principles should be preserving future capacity and being able to return to productivity after a flood, drought or fire.

These are the drivers that we will be reacting to. We should make decisions about how we want to respond to these constraints. We are a wealthy enough society that we have a lot of resources to put into shaping the agricultural sector.

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Money for Reclamation in the Stimulus Package

James Wimberly was worried that Reclamation will get $1.4B in the Stimulus Package, so I went to look at what that money was for:

$1.4 billion in funding for the Bureau of Reclamation. … The funding provided includes: an inventory and analysis of existing infrastructure, especially canals that could potentially impact population centers; maintenance or replacement of Reclamation owned and operated infrastructure; drought preparation and emergency response activities; improving energy efficiency at Bureau of Reclamation owned facilities as well as for maintenance and rehabilitation of Bureau of Reclamation owned and operated hydropower facilities; tribal and nontribal rural water projects; water reclamation and reuse projects; construction of water delivery projects.

I don’t know whether the list provided is in priority order, but if it is, someone did a good job on this allocation to Reclamation. All of the items on the list sound useful to me.

One of the under-appreciated truths in water infrastructure right now is that fixing bottlenecks in canals is worth about ten times more than increasing supplies (pg 20). Maintaining and replacing infrastructure is reasonable; there are a lot of leaky canals and gates out there. Some of those water projects went in a hundred years ago. Drought preparation is overdue and emergency response gets more important as climate change brings more intense floods than we’ve seen before. Improving Reclamation’s energy efficiency is a non-negligible climate change mitigation measure. Water projects use a lot of power. Tribal water projects generally have solid social justice underpinnings. If a tribe is just now getting a water project upgrade, it is likely they’ve been shafted for a couple hundred years. Water reclamation is code for re-using wastewater.

Construction of water delivery projects, all the way last on the list, is the first time anything that could be construed as “building new dams” shows up. Reclamation has earned distrust and monitoring, and I hope that they get careful scrutiny from the House Subcommittee on Water and Power. But on its face, this is not a knee-jerk, water buffalo style “build more dams” prioritization. In fact, the mention of canals limiting deliveries to population centers is a surprisingly knowledgeable and sophisticated appreciation of the problems. Good work, obscure staffer who wrote this portion of the bill. Now make sure that Reclamation spends the money the way you wrote it!

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(If you were looking to be cynical, you could worry that “canals that could impact population centers” means the Peripheral Canal in California, which is the subject of very active conflict. Even so, this language doesn’t mention by name Reclamation’s prospective dam in CA, Temperance Flats. If you want to give the new House and Interior Department the benefit of the doubt, this list can support that reading.)

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I call this scenario “market based”.

Farmers go broke and abandon land as they individually retreat from high fuel costs and scarce water. We can assume the marginal lands go first, unless mortgage decisions or loans for tractors turn out to be more important than soils or water. Individual growers bear the brunt of the pain. Land doesn’t get joined into wildlife refuges. Untended, the random parcels scattered among active farmland becomes banks for weeds and invasive species. Some of it becomes sprawl.

People confront high prices at the register in unmodified spikes, followed by gluts from other countries. Higher quality dairy products and organic produce aren’t supported, so a large market for those doesn’t develop. The cheap-food ethic continues and a race to the bottom in other countries strips their environment and feeds us instead of their own peoples. Besides that, though, California urban dwellers won’t notice very much. They’ll absorb what is left of California production and other regions will switch to truck crops and cattle to fill the rest of the country’s demand.

California meat and dairy will shrink as well. Internalizing the costs of confined-animal-feeding-operations will become too high. In the near future, dairies are facing the costs of controlling the nitrate they leak into groundwater, disposing of cow shit, rising costs of feed crops from climate irregularities, and building emissions controls. One or the combination of these will force them out of business. California raised meat will be in smaller herds on pasture, perhaps in the foothills of mountain ranges.

If the state defaults to augmenting built storage, pieces of environmental laws will yield, or become irrelevant when salmon and smelt are gone. Depending on how fast it all happens, there will be continued conflict within California about construction fixes. It’ll be a shame if the pointless ones get built, but continued rancor is another real cost.

Many islands in the Delta will go out of commission as levees fail. A few people will die in those floods. The west side of the San Joaquin will go out of commission from salt build-up, but not before becoming too toxic to recover as arid grasslands in decades. A few growers will kill themselves. Fuck if I know what’ll happen in Imperial or Coachella. I never pay attention to them. Since I’m guessing, I’ll predict that San Diego and LA will suck their water away. This leaves major ag production in the Sac Valley and the east side of the San Joaquin Valley, which is a decent place for it.

The people who will be hurt first and most will be agricultural laborers, mostly of Mexican descent. They already are. Their established communities and small towns will disintegrate. I do not know where they’ll go after they leave Great Valley agriculture. I assume it will be rough for them, as they are already poor.

This, for California, is not a vision of complete collapse. We’ll have enough water for some continued industrialized agriculture. The interior valleys will continue to be places people drive through. CA will produce less food overall and much less meat. Farms will consolidate further. Cities mostly won’t notice, except in food prices.

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How will global warming and peak oil shape farming in California?

At Gristmill, Tom Lawasky relays a question from Fred Kirschenmann:

[L]et’s assume that ten years from now oil will be $300 a barrel, that we only have half the fresh water resources available that we have today for our food and agriculture system and that we have twice the severe weather events. What kind of agriculture should we be designing to put on the landscape that enables farmers to thrive, invites a new generation of farmers to enter farming and that restores the economic health of our rural communities?

Anyone care to take a shot at an answer? I’m all ears.

OK. I’ll take a shot at this. The thing is, he only gave the easy version. I want to pile on a little before I start, because there are other problems that he doesn’t mention. I think they also set the stage. This is only for California. I assume some of it transfers to industrialized agriculture more broadly, but I don’t know how other systems east of the Sierras work.

First:
The standard quote in CA is that the average age of a California grower is 57. No one knows where recruitment will come from. I overheard two lifelong ag guys comparing notes; their children laugh at the prospect of farming or an ag life. They were saddened. My understanding from reading the comments to the California Department of Food and Agriculture’s Ag Vision process is that barriers to entry are very high when land and experience isn’t passed down through families. A grower warned us that land in the Sac Valley is consolidating under foreign firms at growers retire out; he warns that the foreign owners have no emotional ties to environmental stewardship here. (All of this is plausible hearsay to me. I can’t vouch better than that.)

I posit that people are leaving the sector because large conventional farms are horrible places to be (especially if they are very water-efficient). Hot, ugly, brutal, stripped of cover, sterile except for rows of identical plants. No one with economic choice would be there long. I think extant farmers acclimated to this slowly. But people who haven’t grown used to it don’t want to spend their lives in that.

Second:
Chemical inputs to farming are increasingly expensive.

Third:
There will be less water, but that’s just the beginning of it. We will also need places to put new larger floods, and we are eying historical sinks. That’s a fair amount of farmland to be occasionally inundated. I am starting to worry as much about capacity to apply water as the amount of water available. If you cannot put enough water on a field (because a district cannot keep all of its canals full in a heat wave when everyone takes water, or your equipment (looking at you, drip irrigation) is flow limited) a scorching two days can kill your crop. Doesn’t matter if you have enough water for the rest of the season in that case.

Fourth:
I did not need this, but we’re starting to hear from the plant physiologists. Too much carbon in the atmosphere inhibits nitrogen uptake, which means that plants don’t form proteins as well. I was like, so? Does that mean we switch to different crop varieties that have more protein in them, so I don’t starve to death before lunch? And the professor was like, yeah, that’ll matter for the eaters. It’ll matter more that plants won’t grow well, so yields will weaken. Frick.

Fifth:
There is bad news on the food safety front, but I don’t follow that much. I do know that growers have come to think of things like providing shelter to animals or re-using treated urban wastewater as posing an unacceptable risk of contamination from e. coli. A recall and popular fear of a crop can wipe them out in a year or two. That risk makes them unwilling to consider using their land for supplementary purposes, like habitat.

Those are the driving forces I see. To be fair, I suppose I should put up a list of positive drivers (although most likely I won’t get to it). That would be headed by the amazing ag science base we have here, the decent lead time, and potential from the state climate change plan. I’ll post an unplanned and a planned scenario today.

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Climate change at the district level.

I know, and I’m very sorry.  You come here for obscure government documents about climate change.  Well, lets get this train back on track.  But not, you know, with an actual government document.

 

The American Water Works Association put out an article titled How Should Water Utilities Prepare for CLIMATE CHANGE?.  They really did shout the last part.  It was written based on experiences at East Bay MUD, and it is a nice piece. 

 

To my eye, it starts off a little slow.  I’ve heard the recitation of predicted effects in the west enough that I get tired of the intro section.  But it goes over the change in snowpack and how that makes it harder to hold water.   It says that sea level rise threatens infrastructure near the coast.  It mentions water quality, which is too often overlooked in climate change conversations.  Rougher storms will wash down more sediment, causing more turbidity, making it harder to treat raw water.  Heat will increase algal growth in local reservoirs.

 

The nice part of this piece is that East Bay MUD has done a full scale vulnerability analysis on their own small kingdom.  Good.  They know better than anyone what their system is like, and it sets a great example of districts looking in detail at what is coming their way.  In EBMUD’s case, they think their storage is sufficient, but are worried about floods.  See?  That is great information to have.  To them, this calls attention to a need for better storm forecasting.  They even have numbers:

For example, for each day of lead time, 10,000 ac-ft of additional flood-control space can be gained.

 

The article is a good summary of an engineering look at the situation.  I hope other districts do that.  If I were making recommendations to districts, though, I’d be advising them to check their legal regime just as thoroughly.  We know that climate change is going to amplify the variance in hydrology, and that poses new risk.  I’m not sure that it is good public policy on the whole, but if I were a district, I’d want to be offloading risk as fast as I could.  They should check their bylaws and state and local codes.  What are they responsible for maintaining and protecting and delivering?  Can they afford it under bigger extremes?  Will they be the ones to pay if they don’t?  Who is responsible for failures?  Is that undefined?  If I were a canny district lawyer, I’d be foisting that on the state or on individuals now, before it becomes a more visible issue.

 

Somewhat relatedly:

I want to go to this conference the way I want to breathe air.  It looks SO GOOD.  Irrigation District Sustainability: Strategies to Meet the Challenges.  They’re talking about a lot of good stuff, technical ways to increase capacity and flexibility.  I can’t help but notice, though, that the words “climate change” do not appear anywhere in the conference program.

 

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Culverts

I got a question from a reader who wants to know what makes a good culvert.  She has some land, and an impaired stream crossing, and a mother with a bulldozer, who is not afraid to use it.  She has been offered a new culvert for Christmas.  I love this.

Caveats:
I don’t know anything about this stream or crossing, and am surely not offering engineering advice here.
A project like this could well require permits, from the Army Corps or from the state Fish and Wildlife department.

But, I can tell you in general what you want from a culvert. What you want from a culvert is that it doesn’t get in the stream’s way. From the upstream side, the culvert should be able to pass a flood’s worth of water. If is too small, or choked with debris, water will back up behind it. You’ll get a big pool behind it, if flood pressure doesn’t wash out the obstruction.

On the downstream side, the worry is whether fish can swim upstream. A too-small culvert is bad news for that. Water constrained through it will act like a fire hose; during wet periods, it can be a velocity barrier, too fast for fish to swim through. There are lots of studies and specs on fish flows. If you want to get precise, you can find out exact velocities for different species at different life stages. If you don’t want to be precise, you can look at nearby reaches with fish. They have small pools upstream of rocks, and eddies near the edges where fish can rest between bursts of swimming against the current. Stillwater refugia. You want that.

Fortunately, the solution to both these problems is the same: big wide culverts, with floors that look like the natural stream. (Here.) As a rough recipe, put in a big section of pipe as wide as the stream, buried about a third deep. “As wide as the stream” is wider than just the water, incidentally. You should look for bankfull width, where the sides start to slope down.

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There is another potential problem, one that I hope is not plaguing the reader. It is possible that the streambed below the culvert has been eroding, and the culvert is now the most hardened point along the stream. (The nick point.) The perched culvert is the only thing stopping that waterfall from marching upstream. This is a big problem for fish (because it is hard to leap into a firehose and take off swimming against the flow), and a big problem for fixing the stream. Basically what you have to do then is elevate the downstream section of the stream with a series of weirs. That’s more project than I hope the reader faces.

So, this site is great, with lots of pictures. Another guide, with pictures of failures. Basically, make your culvert really big, as transparent to the stream as you can. 

Good luck!  Send pictures!

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Then, the satellite will call me and tell me to turn off my sprinklers!

Friends, after a day of seminars by several researchers, I feel pretty comfortable telling you that we do not know what effects climate change will have on evapotranspiration. ET is the part of water that goes through the plant (transpiration) or evaporates off the plant surface or dirt. It is a huge part of the water balance, so if you are hoping to know how much water will be in rivers or in groundwater in a few decades, you’d sure like to be able to put a good number for ET into your model. The verdict was that several things will matter:

The growing season will be warmer, and therefore shorter, so crops might use less water from start to finish.
When CO2 is readily available, plants do not need to open their stomata so much to take it in, so less water escapes. Transpiration goes down.
But it will be hotter, so plants will need more water.
If the growing season is short enough, growers might add a second or third crop into rotation, raising the amount of water needed for that acreage.

Basically we don’t know, and we definitely don’t know well enough to settle on a number to put in the big water models.

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I have to say, after seeing presentation after presentation, my doubts about the usefulness of large scale models have returned. I do understand that you have to make assumptions to be able to do calculations, or that you dump all your unexplained phenomena into a closure term. But seeing them presented in model after model (because of course the researchers were ethical enough to present them) made me remember that they aren’t remotely close to real life. Then researchers agreed that they have to refine those terms. A part of me just thinks they should skip the model part and present their gut opinions. I think those might be just as good.

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Finally, I got to hear a presentation about super high tech laser ET measurements. This guy! I saw these stories about fancy-dancy laser measurement of ET in the news a couple weeks ago. I didn’t pay it much mind. Hmmm, I thought. “It looks like another tool, like soil moisture probes. That could be useful, I suppose.” Then I moved on to contemplating lunch. But that was before I saw pictures, with neato telescope-looking gadgets that shoot lasers a couple kilometers to a receiver and then figure out the water content in the air by refraction or optics or physics or science or something. They can do a good job getting moisture in the air for the transect, but it is expensive to get your fancy-dancy lasers out to the field. BUT GET THIS!

They’re working on calibrating the transects from the lasers to satellite thermal imaging. The satellites come over every couple weeks and take pictures at 30m resolution, but the fancy-dancy lasers can refine that. If those can be calibrated, the Landsat images can cover a lot of ground and the fancy-dancy lasers can improve the resolution and then we’ll know everything about ET everywhere! It’ll be great!

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Happy contemplation.

I’m reading my January copy of the Natural Hazards Observer; if you aren’t subscribed to the Natural Hazards Observer, I don’t know why not. In a summary of the International Disaster and Risk conference 2008, the author wrote:

An anticipated outcome of the conference was to be “100 Ideas for Action” generated by the panels or from the experience of the assembled participants. The organizers did seek innovative ideas, but in this ambitious goal the meeting was not entirely successful. As acknowledged at the final session, many of the resulting videoed comments and even more of the solicited “new ideas” were conventional statements of positive intent.

Oh hell yes. This is all we get, all the time. Fucking platitudes. You feel like a grinch resenting statements of positive intent, but when you talk to bureaucrats you hear generic crap about working together and educating the public every single time. And they need more funding. Or, because it is our duty and our desire, we want to bring the public into our decision making. But in some ways, laypeople are the worst. They have just enough information to tell you the basics of your field. I swear, if you ask the broad public what to do in water, I guarantee you will hear one of two themes. If it is agriculture, you get the echoes of Cadillac Desert. If it is urban, you will hear that we should switch to pervious concrete. I’m not quite sure why pervious concrete has captured people’s attention so, but you can count on that recommendation. I love me some concrete, but that is not a new idea.

I’m not sure where to go for new thought. My friend suggests more demanding facilitation at meetings. I have to confess that I want to put a list of the platitudes that we always hear up on the wall, and if someone offers one, we point to it and cut him or her off. We know. Bigger pies, power of collaboration, efficiency, the children are our future. We know. But I am afraid that bureaucrats are so cowed they are afraid to say more than the platitudes that satisfied people last time. I read the comments to newspaper stories hoping that some crackpot will present such a skewed view that it will trigger something new. It is a pretty punishing search. I’ve said before that I’ve enjoyed the transcriptions of public comments for other processes. They aren’t dense, but there is some signal in that noise. I think my best sources for thought right now are the trade journals: Western Farm Press, the Journal of Light Construction, the Natural Hazard Observer or university presentations.*

My favorite recent thought came out of watching testimony to the Blue Ribbon Delta panel. That day, a county supervisor or city councilperson or someone stood up to say that it wasn’t the Delta that was broken, it was the rest of the state. Now that was an interesting prospect. The Delta in its current configuration, sinking peat islands behind shaky levees, is the priority. The remainder of California should act as a vassal state to support the farming lifestyles of a few thousand people farming in an untenable physical circumstance. The purpose of Silicon Valley and Hollywood is to accumulate money to hold back the rising seas in the Delta. I had never seen it like that before, but I got a lot of mileage out of that concept that day. It was way better than hearing another round of conventional statements of positive intent.

*I know you will die of jealousy –I am spending all day tomorrow at seminars on climate change and evapotranspiration. If I can, I will live-blog it for you. Now that is some riveting reading.

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